org.apache.commons.imaging.formats.jpeg.segments.GenericSegment Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.imaging.formats.jpeg.segments;
import static org.apache.commons.imaging.common.BinaryFunctions.readBytes;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
public abstract class GenericSegment extends Segment {
private final byte[] segmentData;
public GenericSegment(final int marker, final int markerLength, final InputStream is) throws IOException {
super(marker, markerLength);
segmentData = readBytes("Segment Data", is, markerLength, "Invalid Segment: insufficient data");
}
public GenericSegment(final int marker, final byte[] bytes) {
super(marker, bytes.length);
this.segmentData = bytes.clone();
}
@Override
public void dump(final PrintWriter pw) {
dump(pw, 0);
}
public void dump(final PrintWriter pw, final int start) {
for (int i = 0; (i < 50) && ((i + start) < segmentData.length); i++) {
debugNumber(pw, "\t" + (i + start), segmentData[i + start], 1);
}
}
/**
* Returns a copy of the segment's contents,
* excluding the marker and length bytes at
* the beginning.
* @return the segment's contents
*/
public byte[] getSegmentData() {
return segmentData.clone();
}
/**
* Returns a specific byte of the segment's contents,
* excluding the marker and length bytes at
* the beginning.
* @see GenericSegment#getSegmentData()
* @return the bye in the segment's contents
*/
protected byte getSegmentData(final int offset) {
return segmentData[offset];
}
/**
* Convert the bytes to a String
* @param encoding
* @return the encoded bytes
* @throws UnsupportedEncodingException
*/
public String getSegmentDataAsString(final String encoding) throws UnsupportedEncodingException {
return new String(segmentData, encoding);
}
// public String getDescription()
// {
// return "Unknown";
// }
}